#173683#173683

#173683 is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.2% C 0.135 H 264.1°. Best body text is #FFFFFF at 11.10:1 contrast (WCAG AA passes).

Color values

HEX	#173683
RGB	rgb(23, 54, 131)
HSL	hsl(223, 70%, 30%)
HSV	hsv(223, 82%, 51%)
CMYK	cmyk(82.4%, 58.8%, 0%, 48.6%)
CIE-LAB	lab(25.13, 19.19, -46.49)
CIE-LCH	lch(25.13, 50.29, 292.43°)
OKLab	oklab(36.15% -0.0138 -0.1342)
OKLCH	oklch(36.15% 0.135 264.1)
XYZ	xyz(5.7678, 4.4585, 22.0249)
Luminance	0.0446 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173683 #836417

analogous

#176C83 #173683 #2E1783

triadic

#173683 #831736 #368317

tetradic

#173683 #83176C #836417 #17832E

square

#173683 #83176C #836417 #17832E

split-complementary

#173683 #832E17 #6C8317

monochromatic

#050B1B #0E214F #173683 #204BB7 #3867DC

Accessibility & contrast

On white

11.10

#173683 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#173683 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173683

11.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173683	#FFFFFF	#000000	##FFFFFF
##173683	1.00	11.10	1.89	11.10
#FFFFFF	11.10	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004186

Deuteranopia (green-blind)

#003782

Tritanopia (blue-blind)

#004957

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #173683;
/* rgb */ color: rgb(23, 54, 131);
/* oklch */ color: oklch(36.2% 0.135 264.1);

Tailwind

colors: {
  custom: {
    50: '#686ca8',
    500: '#173683',
    950: '#000000',
  },
}

SCSS

$custom: #173683;
$custom-light: #686ca8;
$custom-dark: #000000;

JSON

{
  "hex": "#173683",
  "rgb": {
    "r": 23,
    "g": 54,
    "b": 131
  },
  "hsl": {
    "h": 222.778,
    "s": 70.13,
    "l": 30.196
  },
  "oklch": {
    "l": 0.36154,
    "c": 0.13496,
    "h": 264.1
  },
  "luminance": 0.04459
}

Semantic roles & 50–950 ramp

primary

#173683

secondary

#B7953F

accent

#BA3BED

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #173683

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →